I never watched more than a few minutes of Letterman, but I seem to remember there was a regular top 10 segment. Someone is just borrowing the concept.
Years ago I liked Letterman. I think he got more lefty as the years went by. I was always pretty conservative, but as a young adult perhaps his views didn’t seem to bad.
But I really think he just got worse and cranky in his old age. Back in the day he poked a lot of fun at everybody - including the Clintons.